1. Mr Smiths plane _______ . Lets wait for him here .
A. hasnt arrived B. didnt arrive C. doesnt arrive D. couldnt arrive
2. Almost all the water _______ gone . Please save water !
A. are B. is C. have D. were
3. - Look ! There is a tall tree over there . Can you _______ , Dave ?
- Yes , let me have a try .
A. fall off it B. send up C. come down it D. climb up it
4. Mr Li is out . But he _______ here ten minutes ago.
A. was B. is C. will be D. would be