五道英语单选题，请高手入~

21.Isn’t it about the time you__________to do morning exercises?
A.began
B.begin
C.should begin
D.have begun
22.I am very grateful to you for what you’ve given me and__________you have done for me.
A.which
B.that
C.all what
D.all that
23.It was not until she had arrived home _____ remembered her appointment with the doctor.
A.when she
B.that she
C.and she
D.she
24.Determined to__________as if everything were normal, he responded with a kind of indifference.
A.carry on
B.account for
C.bring up
D.get through
25.He__________to arrange a loan through a finance company.
A.tried
B.succeeded
C.managed
D.endeavored

高手啊,请赐教,英语单选题 高手指点, 英语单选题 五道英文单选题 英语高手快快帮忙一道单选题!谢谢请解释一下. 英语高手请进，请做几个单选题． 请高手，专家指点，一英语单选题 单选题，请高手指点 请高手帮帮忙做做这20道英语单选题啊？ 请英语高手再帮做20道单选题(一共两套题,一套已解决) 请高手帮忙做这10几道英语单选题，万分感谢啊！