____ you may be right , I can’t agree completely.
| A．While | B．As | C．If | D．Since |
Butterflies ______ a sweet liquid produced by flowers, which bees and other insects collect.
| A．carry on | B．feed on | C．put on | D．focus on |
According to the law, all foreigners have to ______ with the local police within two weeks of arrival.
| A．associate | B．dispute | C．negotiate | D．register |
While intelligent people can often ______ the complex, a fool is more likely to complicate the simple.
| A．sacrifice | B．substitute | C．simplify | D．survive |
Carbon dioxide, which makes a ______ between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.
| A．difference | B．comparison | C．connection | D．barrier |
Poetry written from the ______ of the urban youth tends to reveal their anxiety over a lack of sense of belonging.
| A．perspective | B．priority | C．participation | D．privilege |