_______ he was 12, Einstein had learned advanced mathematics by himself.
| A．As soon as | B．At the time | C．By the time | D．During the time |
相关试题
The direction _____ which the president would go was kept secret _____ safety concern.
| A．for; over | B．from; about | C．i n; for |
D．at; as |
The computer system is meant to provide students with quick and easy ______ to the digital resources of the library.
| A．access | B．passage | C．way | D．passport |
Those who have _____ money than sense may sometimes act foolishly.
| A．much | B．more | C．most | D．many |
The teacher，together with the students, ______ discussing Reading Skills that _____ newly published in America.
| A．are; were | B．is; were | C．are; was | D．is; was |
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