( )My _____ is young. A. work B. teach C. teacher
Are you behind the tree?______ A.Yes,I'm. B.No,I'm.C.Yes,I am.
What grade are you in? I'm in______. A.Grade 4 B.grade 4 C.Class4
Let me______you. A.help B.to helpC.helping
Time______lunch. A.to B.for C.of
Welcome_____our school. A.to B.on C.不填