填空 根据句子意思，用所给单词的适当形式填空，将答案写在答卷上。
⑴Can you imagine his  (walk) on the moon?
⑵The little girl (prefer) the red one and her mother bought it for her at last.
⑶Can you  (memory) all the words in one week?
⑷The cat's  (die) brought the whole family much sorrow.
⑸You ought to pay attention to  (listen) to the teacher carefully in class and be more careful not to make any stupid mistake..
⑹She remembered (close) the windows, but when she came back she found them all  (open).
⑺Finally she finished the tough work by herself  (success).
⑻Nowadays a great number of  (woman doctor) are very successful .
⑼ I am used to (send) her e-mails instead of (write) letters.
⑽Unless Tina  (study) harder from now on, she (fail) the exam.