1.They visit (religion)... temples several times every years
2.Reading books can widen your (know)... of this wonderful world
3.The lion cub cries out (pity)... for help
4.Ho Chi Minh is a busy (commerce)... center in VN
5.Of VN's many (religious)...,Buddhism is the most popular
6.I've left messages, but there's been no (respond)...
7.The child's (behave)... was unacceptable
8.He doesn't have a mobile phone, so it's (convenience)... for him to contact his friends
9.(environment)... pollution is a serious problem today
10.Everyone must take part in preventing (deforest)...
11.To Edward's great (disappoint)..., Gina never turned up at the party
12.The child spoke (energy)... about her trip to Disneyland
13.(environment)... are concerned about the air pollution in big cities