It is possible that ______ 2030, cars and airplanes will run on the new fuel.
| A．by | B．on | C．until | D．at |
The boy said sadly，“No one can tell ______ will happen next.”
| A．what | B．when | C．who | D．where |
With a nod of his head，he ______ me where I should sit.
| A．indicated to | B．indicated that | C．indicate to | D．indicate that |
When the headteacher announced his plan for a spring outing，the ______ of the students in the class ______ for it.
| A．majority；were | B．most；did | C．most；were | D．majority；was |
This kind of animal has ______ in the world.
| A．died away | B．died down | C．died off | D．died out |
_____ with the size of the whole earth，the biggest ocean does not seem big at all.
| A．Compare |
| B．Having compared |
| C．Comparing |
| D．Compared |