Sam is doing some about the ancient Silk Road．（ ）
A．exerciseB．operations
C．researchD．experiments
Moon cakes for free to those old people this coming Moon Festival．（ ）
A．were offeredB．will offer
C．have offeredD．will be offered
Shall we get together this Saturday or Sunday evening？
is OK．I'm free this weekend．（ ）
A．BothB．EitherC．NeitherD．None
Jack is still working to high standards he has made great achievements．（ ）
A．untilB．ifC．thoughD．Because
We can see some wild animals in the forest，right？
It's hard to say．There be only a few left．（ ）
A．mayB．mostC．needD．should
What about yesterday's dragon dance？
Oh，it's one I've ever seen．（ ）
A．a most wonderfulB．more wonderful
C．the most wonderfulD．a more wonderful