________ nobody gave him any help, he must have done the research on his own.

A. Now that B. Although

C. Though D. For

---- Do you still remember the accident?

---- Yes. Actually, I have experienced nothing more ___________.

A. frighten B. to be frightening

C. frightened D. frightening

Claire had her luggage ________ an hour before the plane left.

A. check B. checking

C. to check D. checked

Seeing the happy _______ of the kids playing on the playground, I can’t help thinking of my childhood.

A. sight B. scene

C. view D. sign

I can’t thank him too much, ____________ I couldn’t have finished the project in time.

A. without his help B. with his help

C. without whose help D. with whose help

The managers discussed the plan that they would like to see __________ the next year.

A. carry out B. carrying out

C. carried out D. to carry out

Every year, typhoons and losses ______ lead to are frightening though measures have been taken.

A. which B. that C. they D. ones

A number of tests have been conducted to _______ that these drugs have no side effects.

A. find out B. look for

C. make sure D. work out

I _______ use a clock to wake me up because at six o’clock every morning the train comes by my house.

A. couldn’t B. mustn’t

C. shouldn’t D. needn’t

----- What do you think of my paper?

----- The _______ part is well written but the latter is just so-so.

A. primary B. former

C. late D. latter