I don’t know how healthy.
| A．can I keep | B．do I keep | C．keep | D．to keep |
---What do you think of Tina?
---She works ____ than anyone else in my class.
| A．harder | B．hardest | C．younger | D．older |
—_______is the population of Beijing ?
—Over ten million ,but I’m not sure .
| A．How many | B．How | C．What | D．How much |
We should protect the earth because it’s home to _______animals .
| A．million | B．millions |
| C．million of | D．millions of |
It is difficult me _______ English well. But I’ll study harder.
| A．to, learn | B．for, learning |
| C．for, to learn | D．to, to learn |
______ travel all over China during the summer holiday?
| A．Why not you | B．Why don’t you |
| C．What about | D．It is a good idea |