You seem to have known DrKen for a long time.—That’s true________ he joined our club years ago

Do I have to sell my old computer It almost stops working.—You ________ do so, it only needs ________. Something has gone wrong with it.

The number of the books in our school library _______ about50,000.

No matter how________, it is not necessarily lifeless.

This is the second time that we _____Guilin, whose beautiful scenery attracts a large number of tourists every year.[ ]