—Mom, my classmates invited me ____ a field trip. May I go with them?—OK.A. go on B. to go on C. to go in
Most students hope _______well in their study.
Half of the books ________easy for the students to read.
The cat climbs into the sitting-room _______the open window.
— ________does it ________to drive to the train station!—Half an hour.
—Why _________Beijing Duck?—Good idea. Let’s go.