Someone is knocking at the door. – It ______ be Tom. He is still in the school.

_____ about the future of these wild animals, people set up conservation areas to protect them, especially the _____ species.

in fact he got ,there was no doubt that he had meant to offer help.

—David,could I use your car?—Sorry,there is something wrong with itI will have it________this afternoon[ ]

Watch! — I ____ but ____ I ____ anything unusual.