—You probably won't need to call Joe, but take his number, just ________.
—Thanks a lot.
| A．at random | B．in return |
| C．in case | D．by heart |
Only when the English class began ____ that he had left his book at home.
| A．will he realize | B．he did realize | C．did he realize | D．should he realize |
---Laura calls on her teacher pretty ____, doesn’t she?
---Yes. At least three times every week.
| A．finally | B．officially | C．frequently | D．gradually |
Eby is ____ a bad stage, always picking fights with his brother for no reason at all.
| A．going over | B．going through | C．giving in | D．giving up |
---I hear that Thomas ____ his holiday in South Africa.
---Yes. He’s prepared for his trip.
| A．spent | B．has spent | C．is spending | D．was spending |
The teacher insisted that I ____ a mistake and insisted that I ____ the physics problem again.
| A．made; did | B．made; do | C．make; do | D．make; did |