----Jack can’t concentrate on his lessons recently. ----Yes, that might _____ his low score in the last test.
Mary wrote an article on _____ the team had failed to win the game.
At last, we found ourselves in a pleasant ark with trees providing shade and _____ down to eat our picnic lunch.
_____ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns.
Look out! The ceiling _____ fall down.
. -- Who are those people? -- A group ____ itself peace protection.