--_______ not very difficult for us young people _______ English.
--So let’s study hard.
| A．It’s, to learn | B．That’s, to learn |
| C．This is, learning | D．It’s, learning |
These model cars ____ in China in 2013.
| A．are made | B．were made | C．make | D．made |
--- When will the popular film star arrive here?
--- I don’t know when he _________. When he _________here, I’ll call you in a minute.
| A．will come, will arrive | B．comes, arrives |
| C．will come, arrives | D．comes, will arrive |
—Were you at Mary’s party last night?
—No, I ____________ my sister. She met with difficult problems.
| A．help | B．am helping |
| C．have helped | D．was helping |
My grandparents____ in that city since 2008.
| A．will live | B．live |
| C．have lived | D．were living |
一Oh，there’s someone knocking at the door．
一 must be that naughty boy.
| A．He | B．This | C．It | D．That |