He chose to teach in a western province, though he _______ in the city for a better life.
| A．could stay | B．would stay | C．could have stayed | D．had stayed |
A chair made of steel is stronger, though costs much more, than _____ made of wood.
| A．that | B．one | C．it | D．those |
In autumn, it’s beautiful outside with golden fallen leaves _______ the ground.
| A．covering | B．to cover | C．having covered | D．covered |
I’d appreciate _____ if you would like to teach me how to use the computer.
| A．that | B．it | C．this | D．you |
Always read the ______ on the bottle carefully and take the right amount of medicine.
| A．explanations | B．instructions | C．descriptions | D．introductions |
—I have not finished with my dinner yet.
—But our friends ______ for us.
| A．will wait | B．wait | C．have waited | D．are waiting |