There are some children _____ in the room.
| A．singing | B．sing | C．are singing | D．to sing |
---I’m glad to meet you.---__________.
| A．The same | B．Thanks | C．Sure | D．Me, too |
The population of Tianjin is ______ than that of Shanghai.
| A．larger | B．less | C．smaller | D．fewer |
_______ people we help,______ we feel.
| A．Many; the more happily | B．The more; the happier |
| C．All; happiest | D．Most; the most happy |
The accident happened _____ a cold winter morning.
| A．on | B．in | C．at | D．of |