He hid himself behind the door _____ he still could see what would happen to his classmates.
The thing __________ we felt very proud is Liaoning aircraft carrier.
The weather in the south is generally warm, but it________ be very cold sometimes.
It was the belief _____ Alex Haley could find his “root” in Afric______ made him decide to go to Gambia.
John had made up his mind to give it up, but on _________ second thought he determined to have __________ third try.
— If our team gets the first place, we will get a bonus. With that bonus, I will go for a trip with my girl friend. — _______.