Under no circumstances _______the search far the missing plane.
| A．do we stop | B．will we stop | C．we stop | D．we will stop |
I made a promise to myself _____ this year, my first year in high school, would be different.
| A．whether | B．what | C．that | D．how |
No matter how bright a talker you are, there are times when it’s better _____ silent.
| A．remain | B．be remaining | C．having remained | D．to remain |
The development of industry has been ____ gradual process throughout ______human existence, from stone tools to modern technology.
| A．/, the | B．the, a | C．a, / | D．a, a |
---Is there anything else to discuss?
---________, I guess.
| A．Not at all | B．No, that’s all | C．Yes, I’m sure. | D．Yes, of course. |
It is a general rule that children’s games and books seek to teach and ______ at the same time.
| A．satisfy | B．appreciate | C．entertain | D．content |