Many scientists have believed that there may be a _________of life on the Mar．
| A．mark | B．signal | C．sigh | D．sign |
________ cold, he covered his blanket, _____ only his arms _____ .
| A．Felt, left, uncovered | B．Feeling, left, uncovered |
| C．Feeling, leaving, uncovered | D．Felt, left, uncovering |
Tom and Jack are both very clever. ________, Tom is _______ Jack.
| A．All in all, as a clever boy as | B．In other words, as clever a boy as |
| C．That is to say, as a clever boy as | D．In word, as clever a boy as |
--- Is that 120? My brother is seriously ill!
---Ok. Help is _________ .
| A．in the way | B．in many ways | C．on the way | D．by the way |
I think that ____ very difficult to learn.
| A．the politics is | B．politics is | C．politics are | D．the politics are |
When we visited my old family home, memory came __________ back.
| A．flooding | B．to flood | C．flood | D．flooded |