They _______ have finished the project so quickly; it was ...

[ Past Modals ]

They _______ have finished the project so quickly; it was very complicated.

A. can’t

B. can’t have

C. must

D. should

Select your answer:
A B C D E

Other quiz:

Causative Verb › View

No clinical studies —- in this child disease research so far.

A. Had completed
B. Will be completed
C. Have completed
D. Have been completed

Tenses › View

I have eaten breakfast already.

A. Simple Present

B. Present Continuous

C. Present Perfect

D. Simple Future (with modals)

Wh- Questions › View

-Assistant:____________do you live?

-Marge: I live with my family in Springfield

A. When

B. Who

C. Where

D. How

Grammar › View

Find the subject. James was the guitarist for a jazz band.

A. James

B. was the guitarist

C. for the jazz band