78. So far, many man-made satellites have ___________ (send) up into space.

77. The young trees must ___________ (tie) to the stick to keep it straight.

76. The mountain will ___________ (cover) with the trees in a few years.

75. Can the report ___________ (write)in English?

74. The Great Green Wall must ___________ (build) in the world.

73. English ___________ (speak) all over the world.

72. The English song ___________ (teach) now over the radio.

71. I ___________ (give) the note to him as soon as school is over.

70. When I got home my grandmother ___________(make)cakes　

69. They will have a trip to the Great Wall if it ___________ (not rain) next Sunday.