Turn right ___the third street, you will see the supermarket _____your left.
| A．at, at | B．on , at |
| C．at, on | D．in ,on |
-- What can trees do _________ us ?
--- They can _________ harmful gases and produce oxygen .
| A．helping , take in | B．to help , take in | C．helping , take out | D．to help , take care |
--- Next week , we will go to visit your school .
--- You are welcome _________ our school and you can go _________ to have a look .
| A．visit , somewhere | B．to visit , anywhere | C．to visit , nowhere | D．visiting , anywhere |
--- Tom is one of _________ students in my class .
--- Yes . He usually prefers _________ at home to playing outside .
| A．the most hard-working , studying | B．more hard-working , to study |
| C．the most hard-working , to study | D．more hard-working , studying |
--- We don’t allow _________ in the library .
--- So we had better _________ outside .
| A．smoking , smoking | B．to smoke , smoking |
| C．to smoke , to smoke | D．smoking , smoke |
-- Shenzhen _________ on the coast .
--- Yes . It is _________ the north of Hong Kong .
| A．lies , in | B．is , to | C．is , in | D．lies , on |