Choose the correct answer to fill in the blank. 

Vitamins ..................... very valuable in protecting the body against harm.

If you .............. me about your birthday last month, I would have sent you a card.

Their house .............. last week.

If only you’d come, ...............................

If you .................. English, you will get along with them perfectly. 

In 1849, Walter Hunt, ...................... American inventor, patented a designthat served as the basis for modem safety pins.

The store ..................... two sales so far this year.

We .............................. a lot of interesting people when we lived in New York

Some of the votes ................. to have been miscounted.

These shoes .................. of leather.

The teacher ............... us how to do theexperiment when the fire bell rang.

I will wait for you ………………………..the restaurant.

Rita .................. class every day.

Our secretary ...............your letter to Head Office.

He walked ……………..the shore.

We .......................... all the windows last weekend.

In the past we threw a lot of ourkitchen waste away, but today many items such as plastic bottles and newspapers .............. 

Call me …………….the evening

............. the experiment three timesnow with different results each time!

Somebody accused me of stealing money.

They ................. personal computerswhen my father was a student.