The rapidly growing birth rate brings about a lot of environment problems, which the government is supposed to take _____.
It was because I didn't attend the meeting ______ I had no idea about the matter.
There was______time when everything to do with__nature could keep Anne spellbound.
The manager believes prices will not rise by more than _______ four percent.
My parents _______ have arrived at suppertime but their flight was held up due to the heavy fog.
The reason _______ he didn’t come was _______he was injured.