.We cannot figure out ____quite a number of insects, birds, and animals are dying out.
It is bad for a man to smoke in public places where smoking is not allowed.
At last the mother had no choice but ___________ her son herself, though she was quite busy.
As a student in Senior Three, I must work hard. ___________, I should take exercise to strengthen my body.
The book didn’t _______to children probably because she employed too many scientific terms.
Selina has recently ___________ Chinese painting to please her grandmother who was born in China.