Some people fear that ______ air pollution may bring about changes in ______ weather around the world.
Can you play the guitar?—________.
I don’t like music which I can’t sing along with.—Me, ______.
Dad, when shall we go to visit my grandpa?—Grandpa is very busy at present.We’ll go to see him whenever __________.
Good news! There is ______ a birthday party this weekend.—Great.I was told it was Mary’s ______ birthday this weekend.