Battery-operated slippers are used________seeing in the dark．
| A．to |
| B．as |
| C．by |
| D．for |
--- Would you like me to help you?
--- .
| A．Never mind | B．Well done |
| C．Yes, please | D．I’d love to |
--- Where’s Bob?
--- He_____ to the library.
| A．goes | B．had gone |
| C．has gone | D．will go |
--- Mary doesn’t remember when and where she this skirt.
| A．buy | B．have bought |
| C．will buy | D．bought |
- --What's your brother?
- --He's a teacher. He art at a school。
| A．taught | B．has taught |
| C．teaches | D．will teach |
--Itwasabeautiful, cloudless sunnydayattheendsummer.
| A．of | B．for | C．at | D．from |