There are some birds_________ happily in the trees.
A. sing
B. are singing
C. singing
The correct symbol of “ therefore” is________.
| A．∵ | B．∴ | C．﹤ | D．﹥ |
The rich man ______ much food_____ the poor families during the hard time.
| A．provides, to | B．provides, with | C．provided, with | D．provided, for |
I _________ my pen when I _____________ in the park.
| A．lost; was walking | B．lost; walked |
| C．was losting; was walking | D．was losting; walked |
It ___________ heavily when I left school yesterday.
| A．was snowing | B．is snowing | C．snowed | D．is snowy |
I told myself to stay ____________ .
| A．wake up | B．wake | C．awake | D．woke |