_______ with so much trouble, we failed to complete the task on time．

Faced

Face

Facing

To face

Peter _______ come with us tonight, but he isn’t very sure．

must

may

can

will

Jack _______ yet, otherwise he would have telephoned me．

mustn’t have arrived

shouldn’t have arrived

can’t have arrived

need not have arrived

A computer _______ think for itself, it must be told what to do．

can’t

couldn’t

may not

might not

The girl is still fast asleep, with her head _______ deep in arms．

bury

to bury

buried

burying

Friendship is like money：easier made than _______．

kept

to be kept

keeping

being kept

When first _______ to the market, these products enjoyed great success．

introducing

introduced

introduce

being introduced

The disc, digitally _______ in the studio, sounded fantastic at the party that night．

recorded

recording

to be recorded

having recorded

Linda worked for the Minnesota Manufacturing and Mining Company, _______ as 3M．

knowing

known

being known

to be known

I didn’t see her in the meeting-room this morning．She _______ at the meeting．

mustn’t have spoken

shouldn’t have spoken

needn’t have spoken

couldn’t have spoken