—How many lessons do you usually have a day? —Six lessons a day. And each of them _____45 minutes.
We last night, but we went to the party instead.
The reason_______ he didn’t come was that he was injured.
There is no doubt _________ the world climate has been changing in recent years.
Will you help him________ you see an old man in trouble ?
I usually do my homework after dinner until 10 pm, ______ is my bedtime.