1. selecting a mobile phone for personal use is no easy task because technology _____so rapidly. a. is changing b. has changed c. will have changed d. will change 2. rainforests _______ and burned at such a speed that they will disappear from the earth in the near future. a. cut b. are cut c. are being cut d. had been cut 3. he_______ of how he can do more for the people. a. had always thought b. is always thinking c. has always been thought d.
