问几道英语题,求解答

题目

问几道英语题,求解答
1.Professor Black had us _______compositions every Friday.
A.to write B.wrote C.write D.writing
答案选C
2.There is something wrong with my TV set,I must have it_____.
A.check B.checking C.to check D.checked
答案选D
麻烦解释一下为什么选

答案

have sb do sth让某人做某事,固定搭配
所以是C
have sth done 让别人修理也是固定搭配,所以是D.如“have my hair cut”理发.CUT是过去式!