【題組】67. This passage mainly tells readers_______.(A) what happens on the opening day of the Sahara F
【題組】61. Sand dunes are formed when______a_____________.(A) sand piles up gradually (B) there is plen
【題組】70. How does tobacco protect itself against an attack from a caterpillar?(A) Its leaves fight ag
【題組】62. The underlined sentence in the third paragraph probably means that in a desert there is_____
【題組】71. What would be the best title for this passage?(A) Plants and Animals (B) How Plants Defend T
【題組】63 It can be learned from the text that in a desert_____b_______.(A) there is no rainfall throug
We know the famous ones—the Thomas Edisons and the Alexander Graham Bells —but what about the less f
【題組】66. The Anchorage Restaurant is_______b_A_______________.(A) in Williamstown (B) in the centre o