Not only ______ to determine the depth of the ocean floor, but it is also used to locate oil.

She wrote her composition carefully to avoid ________ mistakes.

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

   If he were younger, he ______ a professional running competition now.

If some endangered species ______ in zoos, it would help to ensure their future survival.

Mary _________ with her dolls when she was younger

By next Saturday, Tom ______ a whole month without smoking a cigarette.

Mary hardly ever cooks, ______?

Ann has a lot of books, ______ she has never read.

Nobody was harmed in the fire, _____?

The 26th Annual Meeting of the Asia-Pacific Parliamentary Forum (APPF) ______ in Hanoi, our beautiful and peaceful capital city, from January 18th to 21st, 2018.

Geoge wouldn’t have met Mary ____ to his brother’s graduation party.

Susan is fed ________ with the housework.

I must warn you I am not used to _____ so rudely.

Margaret would prefer ______ books rather than see their screen adaptations.

The doctor advised ______ late.