Mary didn’t know who _______ the problem she met with at that time.
A. to talk about B. to talk to about
C. will take to about D. will to talk
—_______ I wash the clothes now?
—No, you _______. You _______ clean the room first.
A. Must； don’t have to； may
B. Must； needn’t to； must
C. Must； mustn’t； can
D. Shall； may； may
—You’d better ask Mr Wang for help when _______ problems.
—I see, but I’m not sure when _______ time.
A. you have； having B. having； he has
C. to have； he has D. to have； having
—Be careful! A car may hit you.
—Thank you! I _______ I _______ so close to the road.
A. didn’t know； am standing
B. don’t know； am standing
C. didn’t know； was standing
D. didn’t know； would stand
Don’t try to do everything at once. Take it a bit _______.
A. at times B. at that time
C. at all times D. at a time
—_______ they _______ the book _______ to the library yet?
—Yes, they have.
A. Have； returned； / B. Have； returned； back
C. Did； return； / D. Did； return； back
