Sahara of .............  Africa is the world's largest desert.

Daisy’s parents don’ t let her go to late - night disco. She  ................ be at home at 9 o’clock in the evening.

Choose the best answer: 
this / time / at / yesterday, I / homework / my / doing / was.

Once Mr. Mirren ------- completes his studies and necessary training, he may come and work for our corporation.

__________is wiping out many kinds of plants and animals.

Choose the correct answer in each sentence.

This month, Mr. Choi has excelled at ------- processing incoming orders.

Unluckily, David's dangerous and incredible journey in search of the Blue Fairy is in ____.

It is a common misconception that running anti-virus software programs and keeping them up to date is enough to protect ................ from viruses.

Once again, congratulations. I hope to see. ............. on Friday.

Choose the correct answer in each sentence.

Robert Lum is one of the most ------- leaders in the import-export business.

Choose the best answer among A, B, C or D that best completes each sentence: We must act ……the law.

John is fat because he eats so many chips.

An endangered species is a species  ..........  population is so small that it is in danger of becoming extinct.

Dear Simon,
This is my first letter to you from my new home. We (22)_____here since March 19th and I’ve been at my new school (23)____3 weeks. I’ve got some new friends here, Dan and Emily. I’ve (24) _____ them for 14 days. I (25)__ the school basketball team. I’ve been in the team (26)_____April 14th. I’ve got a new bike now. I’ve only had it for 2 days. 
Love,
Helen

PS Your last letter to me was on February 21st. I haven't heard from you for two months!

(23).......

Choose the correct answer in each sentence.

The city hosted a display of ----------- fireworks to celebrate the 1th anniversary of its founding.

Choose the correct answer in each sentence.

During the summer, the Clayburgh Museum ____________   its hours until 10:00 P.M. on the weekend.

Choose the correct answer in each sentence.

Sales from the Plainlee Organics juice line has  __________  for less than 25 percent of the company’s total revenue.

Choose the best answer: 
A ................. is a trip you take by plane.

Choose the correct answer in each sentence.

Performing the steps in the proper sequence is  _____________  if the project is to succeed.

Choose the best answer

Động từ “warn” đi với giới từ gì để tạo thành nghĩa “cảnh báo ai không làm gì đó”?

Teacher: “ John, you’ve written a much better essay this time.” John: “_______________________.”