in a hopeless situation, ________ weshould keep a close eye on.

I was fast asleep _____ suddenly my bed began shaking and I heard a strange sound, like a railway trainpassing my window.[ ]

This umbrella is____that one,but____than that one.

60. She is doing her homework .I’lldo_______.

Not only his lesson, but also he often help others with their lessons.[ ]