—You see,I’m poor in maths,you are not good at English,and...—That’s________we should help each other.
The doctor __ my father not to smoke again.
Please ___ your new watch, or you’ll get it lost.
You should ___ the lights if there is no one in the room.
Save water as ___ as we can.
--What’s the time ___ your watch?---On, my watch ___ “A quarter to five”