—When shall we go planting trees in the hill?
—______ it begins to rain, so they don’t need watering.
| A．Not until | B．While | C．Till | D．Unless |
It was not until last year ________ he got in touch with his father in Canada.
| A．where | B．what | C．how | D．that |
Every morning at a ________ time after breakfast she gave him an hour’s lesson.
| A．busy | B．patient | C．convenient | D．present |
________ their service, the workers of the hotel are active in learning English.
| A．Searching | B．Informed | C．To improve | D．Having caused |
His money had not brought happiness and perhaps it had contributed________ his strange sense of values.
| A．up | B．for | C．as | D．to |
—You were driving at 100 km an hour, sir.
—But officer, I ________. My car can’t go more than 80.
| A．may not have to | B．couldn’t have been |
| C．wouldn’t like to | D．needn’t to be |