Within the last year, scientists have come closer than ever .
| A．to deciding which of the questions is right |
| B．to decide which of the questions is right |
| C．deciding whether the question is right or not |
| D．and decided which of the questions is right |
We got lost in the forest and decided to remain _____ we were and waited for rescue．
| A．how | B．what | C．where | D．who |
—Excuse me, what can I do for you?
—Yes. I'd like to place ____ advertisement for _____ used car in your paper.
| A．the; a | B．an; / | C．an; a | D．/; the |
—Let's have a game of tennis; the loser has to treat the other to a hot dog．
—.
| A．I'm afraid so | B．It's a deal | C．You've got a point | D．My treat |
His uncle went abroad in 2010, and _______since．
| A．has not been heard of | B．had not been heard of |
| C．had not heard of | D．has not heard of |
Only by seizing every possible_____ to practice can you possibly hope to improve your spoken English.
| A．solution | B．opportunity | C．experience | D．touch |