-Why are you so excited? -Peter invited me _______ on a trip to Yunnan.
A. to go B. go C. going D. went
-What's that bird called in English? -Which one? There are two. Do you mean the one with _______ neck?
A. long B. longer C. a longer D. a longest
You must clean the room every day _______ keep it as good as new.
A. in order as B. so that C. so to D. in order to
I heard your daughter ____________ in the next room at ten last night.
A. sang B. sing C. singing D. sings
Tom is watching TV, ________ his father is busy working in the study.
A. after B. while C. before D. so
There is not enough _______ for birds here because people build too many houses.
A. ground B. food C. area D. space
