--The news is spreading from mouth to mouth.
--Yes, it has become__________ talk of__________ town.
| A．a ; a | B．the ;不填 | C．the ; the | D．a ;不填 |
Jane _____ these families of chimps for many years and helped people understand how much they behave like humans.
| A．had studied | B．studied | C．studies | D．has studied |
It is so wet there _____ the trees are extremely tall, some measuring over 90 meters.
| A．what | B．which | C．that | D．why |
Many _______ of years later, the first extremely small plants began to appear on the surface of the water.
| A．millions | B．million | C．million of | D．millions of |
_______ Jane’s way of studying chimps, our group are all going to visit them in the forest.
| A．Follow | B．Following | C．Followed | D．To follow |
Jane warns us that our group is going to be very tired and dirty by the afternoon and she is right. However, the evening makes it all ______.
A. favorable B. worthwhileC. precious D essential