Yesterday's concert was great success． All the people showed interest in it（ ）
A．theB．anC．a
The doctors worked for ten hours，___________nobody took a break.（ ）
A．soB．forC．butD．or
—Sam，_________I join you in the community service？
—Of course you can.（ ）
A．canB．mustC．shouldD．need
—______shall we meet for the picnic？
—At the school gate.（ ）
A．HowB．WhenC．WhyD．Where
Space Day of China falls________ April 24th every year.（ ）
A．onB．byC．atD．in
Mary's birthday is coming.We've decided to make a cake for_________.（ ）
A．himB．herC．youD．them