The book ______ I borrowed from the library last week was lost.
who
which
whom
whose
She recognized the man ______ had helped her in the park yesterday.
whose
which
who
whom
By the time we arrived, the movie ______ for 30 minutes.
had started
had been starting
had been on
started
When I got home, my brother ______ his homework for two hours.
had done
had been doing
was doing
did
Scientists ______ the vaccine for over a year by 2025.
had developed
had been developing
developed
were developing
He was tired because he ______ all day before the meeting.
worked
had worked
had been working
was working
By the time the police arrived, the thief __________ (escape).
She __________ (study) English for 5 years before she moved to London.
They __________ (repair) the road for weeks before it was finally finished.
改错 The boy which won the prize is my brother. ___________→ __________
改错 This is the hospital which my mother works. _______→________
The boy ______ under the tree is my brother.
sitting
sat
sits
sits
The problem ______ at the meeting was very serious.
discussing
discussed
to discuss
being discussed
We saw a dog ______ in the middle of the road.
lying
lai n
lay
lied
改错 The window breaking by the storm needs repair. _________→_________
谐音梗 什么水果适合在银行上班
海绵宝宝去体检会查出什么病？
小象找了一份工作，每天下班后都很生气，为什么
金克木，木克土，土克水，什么克风
哪种水果视力最差
如果有一辆车坐了5个人，请问车子是谁的