高二英語Laughter is good for you教案
c. to make; concerned d. making; concerning10. the new engine _______ right now will be used to be fixed in the new type of airplane soon.a. to be experimented on b. being experimented onc. having been experimented on d. experimented on11. rose found her toy bear _______ under the chair.a. hiding b. to hide c. having hidden d. hidden12. when passing me, he pretended ______ me.a. to see b. not having seen c. to have not seen d. not to have seen
1-5 bccbc 6-10 adadb 11-13 dd