用所给动词的适当形式完成句子。小题1:The teacher told us that the earth

用所给动词的适当形式完成句子。
小题1:The teacher told us that the earth (travel) around the sun.
小题2:Students in Yancheng didn’t go to school last Thursday because of the (pollute) air.
小题3:We are not sure if humans (move) to the Mars in the future.
小题4:By the time she left college, she_________（fall）in love with the young man.
小题5:More than one student_________(progress) a lot in English since they became Grade 9 students.