The teacher asked me ________ I needed any help.

You _____ have come to the meeting. There were so many famous people and the argumentation among them was so excellent.

Whether life will continue on the earth will depend on _______ this problem can be solved.

Do you feel like driving out—No. I’d rather we ________ a taxi.

Were you busy last weekend? — Very. Rather than ____ time playing cards as usual, I devoted every effort to ____ an advertisement. [ ]