几道高中时态语态单选题----Have you ever been involved in an automobile

几道高中时态语态单选题
----Have you ever been involved in an automobile accident?
----Only once.My
car slid on a rainy night and went off the road.Fortunately,Imy
seatbelt.
A.was wearing B.wore C.have worn D.had worn
这题不应该是表示当时的状态选had worn吗?
-----When shall we restart our
business?
-----Not until weour plan.
A.will finish B.are finishing
C.are to finish D.have finished
D 求详解
The president hopes
that the people will be better off when he quits than when he.
A.has started
B.starts C.started D.will start
C 整句都没有出现暗示过去时的词啊.
I
have to see the doctor because Ia lot lately.
A.have been coughing B.had
coughed C.coughed D.cough
A 求详解