Doctors in the town are using the books______their studies and treat patients．（ ）
A．continueB．to continue
C．continuingD．continues
When I was on my way home，it suddenly started to rain_____．（ ）
| A． |
heavily |
B． |
quickly |
C． |
hardly |
"Do you know when the Belt and Road International Day is？"
"Yes，it is____December 16th．"（ ）
| A． |
at |
B． |
on |
C． |
in |
"Look!An old man is lying on the road．""His leg is badly hurt．Let's call_____．"（ ）
| A． |
118 |
B． |
119 |
C． |
120 |
There is a______in my neighborhood and I often go there to see tigers．（ ）
| A． |
zoo |
B． |
bank |
C． |
school |
This is the best book I have ever read．I like it very much．（ ）
| A． |
which |
B． |
that |
C． |
who |
D． |
when |