The boy is ________ to look after his sister.
| A．enough old | B．enough young |
| C．young enough | D．old enough |
Mo Yan, ________ordinary-looking writer from Shandong, China, was presented the Nobel Prize for Literature last year.
| A．a | B．an | C．the | D．/ |
——Who watered the flowers beside the window?——Helen ____________.
| A．Did | B．Do | C．did | D．does |
Goldfish don’t know _______ to them three seconds ago.
| A．what happens | B．what is happening | C．what happen | D．what happened |
Does this book belong to ______?
| A．me | B．mine | C．I | D．my |
It ______ him an hour to play basket ball every day.
| A．spends | B．took | C．costs | D．takes |