48. When does the flight arrive in London? ________

92. Why not try carpooling? That will reduce your cost and make a difference in your trip.

91. Even if you leave the room only for a little while, please remember to turn off the lights.

90. It is difficult to master a foreign language, but it pays to make the effort.

89. Tom is new to the town. He has never been there before.

88. We need a truck driver, and you are perfect for this job

87. If you need our products, please contact me in advance.

86. Mary is ambitious. She is keen to get ahead in her career.

85. This is made of glass. It costs 100 Yuan at (the) most.

84. Can you provide any evidence to show that he was not in the crime scene at that time?

83. We were impressed by his straightforward answers.