Why not ______ your teacher for help when you can’t finish ______ it by yourself?
_______ his help, we finished the work on time.
-_____ have you worked? -Since 2 pm.
We can’t work out the physics problem. Can you tell us ________?
We’ll go shopping if it ________ rain tomorrow.
–Whatdidyourmothersay,Tom? -Sheaskedmewhy___.