They had to operate _______his arm because it was broken in two places.
| A．with | B．/ | C．at | D．on |
—He plays basketball so well! Who taught _______?
—He learnt it by _______.
| A．him; him | B．himself; himself | C．him; himself | D．himself; him |
—_______ can I keep the books?
—Two weeks.
| A．How long | B．How often | C．How far | D．How soon |
My mother often tells me _______ my classmates when they need.
| A．help | B．to help | C．helping | D．helps |
Do you prefer _______?
| A．skate | B．skates | C．skating | D．skated |
You should _______ the doctor’s advice and _______ the medicine on time.
| A．follow; eat | B．follow; take | C．take; eat | D．eat; take |