A student is （allowed) to （enter into) this room （only if) a teacher （has given) permissio

A student is (allowed) to (enter into) this room (only if) a teacher (has given) permission.

A．allowed

B．enter into

C．only if

D．has given

请帮忙给出正确答案和分析，谢谢！

A、is

B、m

C、is

A、teacher

B、pupil

C、girl

A、I

B、me

C、my

A、teacher

B、student

C、oy

A、oy

B、girl

C、student

A、teacher

B、pupil

C、student

A、do

B、take

C、make

D、have

A、He is John.He's a student

B、This is John.She is a student

C、This is John. He is a pupil

A、student

B、singing

C、good-looking

D、out

A、computer

B、TV

C、student

A、Is

B、Are

C、Am