The number of women dying from breast cancer has fallen to its lowest level ____ records began in 1971.
| A．when | B．before | C．since | D．after |
相关试题
Don't sit there ________ nothing. Come and help me with this table.
| A．do | B．to do | C．doing | D．and doing |
He made another wonderful discovery, _____ of great importance to science．
| A．which I think is | B．which I think it is |
| C．which I think it | D．I think is |
One of the best ways for people to keep fit is to______ healthy eating habits.
| A．grow | B．develop | C．increase | D．raise |
查语音辨析series
| A．serious | B．reception | C．energetic | D．equal |
feast
| A．breast | B．league | C．measure | D．wealthy |
insurance
| A．usual | B．usage | C．suitcase | D．ensure |
exist
| A．express | B．extremely | C．exactly | D．exit |
oxygen
| A．genuine | B．gravity | C．garlic | D．glory |
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