Helen is on time for everything. How ______ it be that she was late for such an important interview?
| A．might | B．can | C．must | D．may |
We had to be patient because it＿＿＿some time ＿＿＿we got the full results.
| A．has been ； since | B．had been ； until |
| C．was； after | D．would be ； before |
He lived in poverty, and he couldn’t help ＿＿＿.
| A．so | B．such | C．it | D．that |
I took ＿＿＿for granted that he would believe in us.
| A．that | B．the thing | C．it | D．this |
＿＿＿used to be thought that the earth was square.
| A．He | B．What | C．It | D．That |
Does＿＿＿matter whether he can finish the job on time?
| A．this | B．that | C．he | D．it |