1. —Would you mind giving your advice on how to improve our learning efficiency?
—If you make most of forty minutes’ classes day after day, there will be ____ switch in grades.
A. /; / B. the; a C. /; a D. the; /
2. —You don’t look very . Are you ill?
¡¡— No. I’m just a bit tired.
A£®good B£®well C£®strong D£®healthy
3. We tried to finish the work before dark, but it didn’t quite as planned.
A. go on B. carry on C. make out D. work out