I am going to visit the Great Wall tomorrow.—_______.

The achievements of the greatest minds in science could never have been reached________ the patient work of hundreds of others．

The flowers ______ my mother, but my sister thought they were for her and took them.

－I think students should be allowed _____ homework with friends.－I disagree. They talk instead of ________ homework.

This beer isn’t bad; I’m beginning to________a taste for it.[ ]