In Vietnamese schools, English, mathematics, and literature are three _______ subjects, which are compulsory in many important national examinations.

_________these plants regularly or they will die. 

Last year Matt earned .............. his brother, who had a better position.as

Polio, one of a group of spinal inflammations, cause fever and paralysis often resulting in disabled and deformity.

Choose the best answer from the four options given (A, B, C, or D) to complete each sentence.

____________hundreds of technical specialists at the convention in Zurich last month. 

I found this wallet on the street while I _________to school. 

............ by his work, he threw himself on his bed.

I _________tired. Let's find somewhere to have a rest. 

Portuguese _______ as an official language in this city since three hundred years ago.

He _________missed the train. He was just in time to catch it. 

Genetic engineering is helping researchers unravel the mysteries of previously incurable diseases so that they can get to its root causes and find cures

Among bees ............ a highly elaborate form of communication.

Choose the best answer.

Our friends send these postcards to us.

Cách 1: These postcards _____ by our friends.

Cách 2: We _______by our friends.

Why did Berth ask you ............  a bicycle?

Although almost all insects have six legs, a immature insect may not have any.

Two school boys are talking to each other. Harry: “Were you chosen for our school football team? Porter: “ ..............    ”

Australian koalas are furry, gray animal that live in trees and feed on leaves.

He has read a lot of books and ______ a lot of knowledge.

The policeman explained to us  ...........  get to the market.e

The Internet enables users of computers to _________ information in a variety of forms.

Linda and Suka are talking about Thomas.

Linda: "Thomas thinks he knows everything about dinosaurs.” Suka: “ .............    .”