Professor Tu Youyou never stops doing research on Chinese medicine，______？（ ）
| A． |
is she |
B． |
does she |
| C． |
isn't she |
D． |
doesn't she |
Chinese scientists have made great ___________ in medical research．（ ）
| A． |
attention |
B． |
progress |
| C． |
information |
D． |
pride |
I wonder ________．
Of course it is．（ ）
| A． |
that mooncakes are delicious |
| B． |
whether June is a good time to visit Dandong |
| C． |
when the band starts playing this evening |
| D． |
if the bookstore opens today |
________! I'm sure he does quite well in English．
You're right． He got a very good prize in the English competition last year．（ ）
| A． |
What an excellent chess player |
| B． |
How high that boy is jumping |
| C． |
What an exciting magician |
| D． |
How beautifully that boy speaks English |
Tom is always ready to help others．
________． He often helps me with my English．（ ）
| A． |
So he is |
B． |
So he does |
C． |
So is he |
D． |
So does he |
John________ us when he is free．（ ）
| A． |
joins |
B． |
join |
C． |
will join |
D． |
joined |