The USA has a quarter of the leading 200 in the latest ranking of the world universities, _________ 30 of the universities are in the UK．
| A．when | B．while | C．where | D．why |
He ____ you more help even though he was very busy .
| A．might have given | B．might give | C．may have given | D．may give |
I thought you ____ like something to read , so I have brought you some books .
| A．may | B．might | C．could | D．must |
I can''t find Jane anywhere in the office building . Where ____ she have gone ?
| A．must | B．can | C．should | D．need |
Mary ____ be in Paris . I saw her a few minutes ago .
| A．mustn''t | B．shouldn''t | C．can''t | D．may not |
You are wet through . You ____ in the rain .
| A．must come | B．must be caught | C．must have caught | D．must have got caught |