What do you think of the four classics (名著) of China—They are wonderful, but I’ve read of them.

achievements_______ without thecontribution of Qian Xuesen, a key leader of the New China’s nuclear, missileand so on

Would you like to go fishing with me tomorrow _________ .

We all had a lot of fun at the barbecue yesterday. Pity you weren’t there.—I really should have gone with you but I________on some remaining problems.

What is it _____ his daughter needs most