There is _____ river at the foot of the mountain(山). _____ river is dangerous.
— Does David have a ping-pong ball?—________. But he has some tennis balls.
Hi,Linda. This _____ my sister and those ______ my brothers.
_____ your brother_____ baseball?
— ______are my dictionaries ?—They’re in the schoolbag.
_____ pencil box is beautiful. But_____ is more beautiful than _______.