Many accidents _________ by careless drivers last year .
| A．are caused | B．were caused |
| C．have caused | D．will cause |
John seemed puzzled about _____ the question meant.
| A．how | B．why |
| C．what | D．which |
Everyone tells me I’m a good speaker, _____ I really don’t like speaking in public.
| A．and | B．so |
| C．but | D．or |
一Jane looked beautiful at the wedding.
一Huh! Too much make-up＿＿,
| A．as I must disagree’ | B．when I dare say |
| C．unless you mind | D．if you ask me |
--- John is said to have written two books last year.
一Yes, so he＿＿．They are both about the Second World War.
| A．is | B．does |
| C．has | D．did |
Vitamin D gets produced when animals are exposed to direct sunlight, for＿reason, it
is always advisable to give them chances to spend time in the sun.
| A．whose | B．that |
| C．which | D．its |