改错：下列各句中画括号部分有一处是错的，请找出来，并改正

1．sandwich-sandwishes
2.What's-What
3.Who's-Whose
4.Look-Look at

二.改错：写列各题画框部分有一处错的，请找出来，并改正。
( B)1.(Do) you like (sandwich)?(NO),I like (tea). sandwiches
A B C D
( A)2.(What's) (would) you like?(I'd) like (some tea). _What
A B C D
( C)3.(What's) the (matter) (of) (you?). with
A B C D
( A)4.(Who's) (book) (is) (this?). _Whose
A B C D
(A )5.(Look) (the) (blackboard),(please). Look at
A B C D

1.sandwich应改成sandwiches
2.What's应改成What
3.of应改成with
4.Who's应改成Whose
5.Look应改成Look at