1) I (am, is, are) Russian. 2) These people ((am, is, are) English.
3) The watch (am, is, are) rather expensive.
4) She (am, is, are) very young.
5) It (am, is, are) a difficult question to answer.
6) The message (am, is, are) very short.
7) I (am, is, are) veryglad to see him.