(b.) Mark: Saturday is coming. Let’s go hiking. Sam: I don’t like to go outside. I hate to feel mosquitoes   (16)   around me, you know.  Mark: But   (17)   the wind blowing on my face is good.You can also enjoy the fresh air along the way.  Sam: That’s fine. I’ll go with you. But   (18)  .Mom will go out that day, so she can’t take us there.How can we go there by  (19)  ?  Mark: Come on. It’s easy. We can take a bus there. It takes only ten minutes.Besides, we don’t need to bring anything there. Sam: Sounds great! That’s really    (20)   .Let’s leave earlier tomorrow.I can’t wait to enjoy the trip!& mosquito 蚊子 around 到處
【題組】16.
(A) to f ly
(B) f lying
(C) f lew
(D) were f lying