Nick is looking for another job because he feels that nothing he does ______ his boss.

Once out of the earth’s gravity, the spaceman is ___ by the problem of weightlessness.

Frequently single-parent children ________ some of the functions that the absent adult in the house would have served.

－Did you tell Julia about the result?       －Oh, no, I forgot. I ________ her now.

Some steps have been taken to protect the forest _______.