--We have finished watering all the trees, Miss Yang.--________, boys and girls. Let’s have a drink.
I find __________ very difficult to learn English well .
The math problem is too difficult ,I can’t__________ .
On National Day there are more than five __________ people in the zoo.
Tina used to __________a round face.
There ’s __________“u” and __________“s” in __________ word “use”.