--Why are the windows so dirty?--Because we_________them for a long time.A. have cleaned B. haven't cleaned C. didn't clean
Some Math problems are difficult for the students work out.
--- Who will send you to the new school, your mom, your dad or your uncle? --- _______. I’ll go there by myself.
Could you tell me ______, please?
______ young trees have been planted here, now it is a really beautiful place.
---Is that modern car _______, Linda? ---Nobody but Jim can afford such an expensive car. It must belong to _______.