In face of ______failure, it is the most important to keep up ______ a good state of mind.
A a; - B.the; - C.-; a D.-; the
After the age of 50 people often _____________ their individual ambitions.
A.desert | B.give in | C.give away | D.abandon |
He is a key ____________ in the murder so we must protect him from all kinds of danger.
A.witch | B.watcher | C.wizard | D.witness |
Russia is _________ on the north of China.
A.bounded | B.bound | C.boundary | D.lied |
Lately some scientists are experimenting ___________ white mice to ____________ this kind of medicine.
A.on,try on | B.with, test on | C.on ,test out | D.with,carry out |
When the reached the top of the hill ,they _______________ so they had to stop for a rest.
A.held their breath | B.out of breath | C.lost their breath | D.breathed deeply |