Taking physical exercise regularly is an effective way to avoid __________ with the flu.
| A．to infect |
| B．infecting |
| C．to be infected |
| D．being infected |
There are________to show that a new, different city is coming out of its dark past.
| A．signals | B．marks | C．signs | D．symbols |
theory
| A．months | B．worthy | C．smooth | D．mouths |
sugar
| A．underline | B．circulate | C．success | D．pull |
advise
| A．island | B．decision | C．present | D．increase |
realize
| A．really | B．weather | C．reasonable | D．breath |