He has      for three or four days. 

 He had no choice but to go on because it is their agreement that no one ______ quit the plan half way.

 My English-Chinese dictionary isn’t in my schoolbag. Where _________ I have put it?

Tom ____ be ill, for I saw him playing basketball an hour ago. 

— May I take the magazine out of the reading room?— No, you can’t. You ______ read it here. It’s the rule.