——Did you find the missing couple in the mountain yesterday?
——No, but we _____ to get in touch with them ever since.
A．have tried B．have been trying C．had tried D．had been trying
I think you should go back to your _____ plan, which is much more practical than the present one.
A．random B．original C．abstract D．ridiculous
——Jim is addicted to novels recently.
——Yes, that might _____ why he did so badly in the last test.
A．answer for B．apply for C．account for D．call for
I was surfing the Internet _____of successful rendezvous and docking of Shenzhou-VIII and Tiangong-I.
A．when suddenly came the good news
B．while the good news came suddenly
C．when suddenly did the good news come
D．while suddenly came the good news
No one expected house prices to fall, but _____ that's exactly what happened.
A．moreover B．thus C．anyway D．however
Many people can't learn any lessons from the mistakes they've made _____ they get hurt somehow.
A．whether B．unless C．if D．as
