—A lovely day, isn't it?—Yes. I love ________ when the weather is like this. Why not go out for a walk?
The experts are trying to find ways of ____ the animals in danger.
Tom, as well as the other children who ____ no parents, ____ good care of in our country.
Go on ______ the other exercise after you have finished this one.
We grow all our own fruit and vegetables, ____ saves money, of course. A as B. which C. that D. what
If you have some difficulties ____ your grammar, you had better ask your teacher ____.