Most online classes let students learn _____ their own pace.
| A．at | B．to | C．from | D．by |
Between the two buildings ___ a hospital.
| A．stand | B．stands | C．are there | D．is there |
The sun ___ we get heat and light is the most important source of energy.
| A．that | B．which | C．from that | D．form which |
I don’t think she has to do so, ___?
| A．has she | B．do I | C．does she | D．have I |
Facing danger, he always ___ calm.
| A．turns | B．seems | C．remains | D．appears |
The nurse worked hard to help the sick and ___ .
| A．the dead | B．the dying | C．the dead man | D．the dying man |