His ability has never been in doubt－the question is _________ he is prepared to work．

whether

if

that

where

Finally I got the job I had dreamed about．Never in my life _________ so happy．

did I feel

I felt

had I felt

I had felt

Her work was _________ by her boss．

high thought

high thought of

good thought

well thought of

Charles Babbage is generally considered _________ the first computer．

to have invented

inventing

having invented

to invent

China is a country _________ the Third World．

belong to

belonging to

belonged to

is belonging to

When her mother got home, Mary pretended _________．

to read

to have read

to be reading

reading

Generally speaking, _________ according to the directions, the drug has no side effect．

when taking

when taken

when to take

when to be taken

Scientists are still _________ a cure to cancer．

searching of

searching

searching for

in search of

Do you doubt _________ he will win?

whether

if

that

when

The man in prison insisted that he _________ nothing wrong and _________ set free．

had done; should be

should do; should be

had done; had been

should do; had been