______ good time they have!

So far we have done a lot to build a low-carbon economy, but it is idealWe have to work stillharder.[ ]

e were in the college, westay in the library, devoting ourselves to books.

The twins may look the same _____ each other, but they are different ______ many ways.

s he ________ he has a good command of English,he sometimes feels it hard to find an appropriate version for some Chineseidioms.