The air quality in the city, ________is shown in the report, has improved over the past two months.
| A．that | B．it | C．as | D．what |
will be quite a long time _______ she is back again, so don’t be too cross with her.
| A．that | B．since |
| C．before | D．until |
He will come to understand your efforts sooner or later. It’s just a matter of ________.
| A．luck | B．value | C．time | D．fact |
The president of the World Bank says he has a passion for China , he remembers starting as early as his childhood.
| A．where | B．which | C．what | D．when |
With the loss of labor，the old farmers ________at home had to choose less laborintensive crops.
| A．having left | B．to leave |
| C．left | D．leaving |
If my lawyer ______ here last Saturday, he ______ me from going.
| A．had been; would have prevented | B．had been; would prevent |
| C．were; would prevent | D．were; would have prevented |