【单选题】
They are working hard to____ what they have lost.
【单选题】
Eeveryone is working harder and living a happier life now, _________ ?
【单选题】
He _______ working before 6 o’clock.
【单选题】
The atmosphere _______ certain gases mixed together in definite proportions.
【多选题】
She insisted that she _____ the trip.
【单选题】
As a result of the unfavorable working conditions, the project has to be put off ____ .
【单选题】
Im going to _____a flat near the company Im working at.
【单选题】
Certainly there is no____ evidence that living together increases the chance of sickness.
【单选题】
23. Never _______ forget the days when _______ together with you.
【多选题】
The artist ___________ an interesting picture by putting various coloured shapes together.