Many people believe we are heading for environmental disaster _____ we basically change the way we live.
| A．but | B．although | C．unless | D．once |
---What do you think of your new English teacher？
--- She was well prepared for her first lesson and left us a good________.
| A．expression | B．instruction | C．appearance | D．impression |
Being afraid of falling behind the times, he has always been keeping himself ___ of the latest development of technology.
A. instructed B. intended C. informed D demanded
Today, we’ll discuss a number of cases ____parents have much difficulty in communicating with their children.
| A．which | B．that | C．where | D．why |
He always brings me a pretty gift ____ he comes to visit me.
| A．by the time | B．sometimes | C．every time | D．at times |
My father is clearly in____ dilemma about how to handle___ quarrel between us.
| A．the; a | B．/; the | C．a; the | D．a; / |