The volunteer spoke as clearly as she could_____________the visitors understand her.A. to make B.making C.made
Mary was born in 1998 and she began to play ________ guitar at the age of seven. A.a B.不填 C.the
—Can you play foot ball? —________.It’s hard.
In some Western countries shops are closed ________ weekends.
Our teacher always helps us ________ our English.
The desk is not dirty.You ________ clean it.