Put yourself in situations _____ you will be forced to communicate in English, and you will see more progress over time.
| A．when | B．that | C．where | D．how |
_____ the city’s public school system should be open to the children of migrant workers has become the focus of discussion.
| A．That | B．What | C．Whether | D．If |
—You may find the key to the math problem on page 107．
—Ah, it's so simple. I wonder why I _____ of that．
| A．hadn’t thought | B．haven't thought | C．didn't think | D．wasn't thinking |
Cars do cause people some health problems, in fact far more serious _____ than computers do.
| A．one | B．ones | C．it | D．those |
More people are choosing to work _____ retirement age，since the living expenses are shooting up sharply.
| A．under | B．beyond | C．against | D．for |
On seeing_____ gift they wanted, the kids screamed with _____ delight.
| A．/; a | B．a; the | C．the; / | D．the; a |