Mathematics is difficult ______.
A. to learn
B. for learning
C. to be learned
D. of learning
My hair is so long that I must go to a barber's shop and______.
A. have to cut it
B. have it cut
C. get it to be cut
D. to cut it
The pencil ______ well.
A. writes
B. is written
C. was written
D. writing
---- I can't see the blackboard very well. ---- Perhaps you need ______.
A. to examine your eyes
B. to have your eyes examined
C. to have examined your eyes
D. to be examined your eyes
微信支付 
支付宝支付