Science and technology have in important ways __________ the improvement of agricultural production.
A. contributed to B. resulted from C. carried off D. handed over
Mr. Han, my neighbor, is always helping those who are in trouble without expecting anything __________.
A. in turn B. in return C. in detail D. in addition
He is very sick. I insist that a doctor __________ immediately.
A. has been sent for B. sends for C. will be sent for D. be sent for
In the novel, the two cities referred to __________ London and Paris.
A. be B. being C. are D. was
He was down with the flu, and __________ couldn’t come to the party.
A. moreover B. meanwhile C. therefore D. besides
All the task __________ ahead of time, so they decided to go on holiday for a week.
A. having finished B. had finished C. having been finished D. had been finished
