—English has a large vocabulary, _______?—Yes. Know more words and expressions and you will find _______ easier to read and communicate.
This cake is very sweet. You________a lot of sugar in it.
—Lucy doesn't mind lending you her dictionary. —She________. I have borrowed one.
He________have completed his work; otherwise, he wouldn't be enjoying himself by the seaside.
He paid for a seat, when he________have entered free.
________such heavy pollution already, it may now be too late to clean up the river.