–- Excuse me, would you mind answering a few questions?--- Well, I don’t know. I’m in a hurry _______.

As is known to all language learners, the newly learnt words will soon be forgotten unless ______ used in everyday communication.

---You  aren’t  looking  well. Anything the matter?---I’ve  been  surfing the net too long. I’m a bit tired.I can hold on,____.

In recent years, the ______ dry heat had led to a series of natural disasters.

These machines can help recycle the waste which would ______be thrown away.