My sister is a strongminded girl.At no time I think will she ________ to difficulty.[ ]

The West Lake is famous for its beautiful scenery.

In the last few years thousandsof films all over theword.

____ 1960s, ________ number ofhabitants here is very _______ ,and it was since the middle of 1970s that thepopulation has been increasing rapidly.

下列各句中，没有语病的一句是（ ）