. Teaching a pronunciation class to a mixed group of learners can a teacher with many challenging problems.
| A．provide | B．produce | C．present | D．offer |
Do you know the farmer under the big tree?
| A．lied | B．laid | C．laying | D．lying |
．The ____ boy was last seen ______ by the lake.
A missing, playing B．missing, play C． missed, played D．missed , to play
．—There is likely to be heavy rain tomorrow.
—_______, we’ll have to change the plan for the outgoing.
| A．If so | B．If not | C．Unless so | D．Unless not |
People have realized that they should go on _____ balanced diet and do _____ exercise every day.
| A．a; / | B．the; an | C．the; the | D．/; an |
．_____ in the newspaper that there is another good harvest this year.
| A．It has reported | B．As is reported | C．That is reported | D．It is reported |