The real reason for the fire _______ a burning cigarette end.
| A．starts with | B．leads to | C．focuses on | D．lies in |
We’ll have to race the clock to complete the work on time.
| A．beyond | B．over | C．against | D．from |
So much progress _____ in the past few months that she now has no difficulty in making herself understood in English.
| A．did she make | B．has she made | C．she has made | D．she made |
Much to my, I’m unable to accept your kind invitation.
| A．fault | B．duty | C．guide | D．regret |
—Shall we hang out tomorrow morning?
— ________ I’ll save the morning for my essay.
| A．Sorry, I can’t make it. | B．Yes, it’s a good idea. |
| C．Well, it all depends. | D．No, that’s impossible. |
-- Isn’t that Ann’s husband over there?
-- No, it ________ be him. I’m sure he doesn’t wear glasses.
| A． can’t | B．must not | C．won’t | D．may not |