1. (2020九下·九龙坡月考) 听下面一段材料，回答问题。

Hi Sam, where is Mike? He must be in the library, right?<br />No, he can't. I have just returned from the library. Look, there is a jacket on the playground.<br />Oh, it's Mike's.<br />He must be playing basketball on the playground. He likes playing basketball best.<br />Hi Sam, where is Mike? He must be in the library, right?<br />No, he can't. I have just returned from the library. Look, there is a jacket on the playground.<br />Oh, it's Mike's.<br />He must be playing basketball on the playground. He likes playing basketball best.

1. （1） Where did Sam go just now?

   A . The library. B . The playground. C . The sports club.
3. （2） What must Mike be doing?

   A . He must be playing volleyball. B . He must be playing basketball. C . He must be buying a jacket.