The student said there were a few points in the essay he_________impossible to comprehend.
A.has found B.was finding C.had found D.would find
The government is__________efforts so as to strengthen skills training for rural migrant workers.
A.picking up B.stepping up C.holding up D.breaking up
— Henry was forced to leave for the invalid visa.
— He__________the period of time
A.should have extended B.must have extended
C.may have extended D.would have extended
Try to buy less______unnecessary shopping could become another source of pressure to the environment.
A.though B.unless C.because D.before
Take an active part in programs you enjoy______you can meet various kinds of people.
A.what B.when C.that D.where
Mr.White works with a chemical import-export company,but he________for this industrial exhibition, since he is on leave.
A.has worked B.works C.has been working D.is working
