The doctor finally gave up the ____ of medicine for full - time writing．
| A．days | B．process | C．skills | D．practice |
China came up to the sixth place in the world _____ economic aggregate(经济总量)。
| A．instead of | B．in favor of | C．in exchange for | D．in terms of |
It’s unfair! You sit there, listening to me, _____ I stand here, teaching you.
| A．as | B．when | C．while | D．since |
Only _____ our courage beats our fear ________________.
| A．when; can we succeed | B．if; we can succeed |
| C．because; will we succeed | D．while; we’ll be able to succeed |
Three fourths of the surface of the earth ______ covered with water.
| A．are | B．is | C．will be | D．was |
We finally bought a house, _________ about seven feet by ten.
| A．measured | B．measuring | C．is measured | D．measures |