Don’t be afraid of asking for help ___________ it is needed.
| A．unless | B．since | C．when | D．although |
The train is running ______120 kilometres an hour.
| A．at a speed | B．at the speed | C．at a speed of | D．on a speed of |
Jumping out of ____ airplane at ten thousand feet is quite _____ exciting experience.
| A．/ ; the | B．/ ; an | C．an; an | D．the; the |
Please remind me _______ he said he was going. I may be in time to see him off.
| A．where | B．when | C．how | D．what |
He _____ up the car, hoping to arrive home before dark.
| A．gave | B．turned | C．picked | D．speeded |
I have worked with children before, so I know what ______ in my new job.
| A．to expecting | B．expected | C．to expect | D．being expected |