His sister since she left home in 1998.
| A．had not been returned | B．has not returned |
| C．had not returned | D．returned |
Any passenger who has booked the plane ticket must _____
it three days before the departure date.
a. claim b. confirm c. declare d. replace
Shortly after the small country gained its independence, it was _____ by most of the countries in the world.
a. committed b. admitted c. recognized d. trusted
A teacher is _____ to be patient and not to lose his temper whatever mistakes his students make.
a. supposed b. meant c. claimed d. suggested
Hobbies offer knowledge and relaxation. ___, they help improve one’s mental and physical health.
37.
a. Furthermore b. Howeve
r c. Therefore d. Partly
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