填 space。句意：

The man suffered two heart attacks in the space of a week. 这个人一周内经历了两次心脏病发作。

in the space of：虽然其中用的是 space，但该短语主要用于时间，表示“在一段…的时间内”“在…期间”。如：

106 people died in the space of five days. 五天里死了106个人。

They moved house twice in the space of a year. 他们一年中搬了两次家。

They finished in / within the space of an hour. 他们在一个小时内就完成了。

Two elections were held within the space of a year. 在一年的时间之内举行了两次选举。

Both their cars were stolen in the space of three days. 他们两个的车在三天时间里都被偷了。

in the space of 中的 space 有时也表示空间或篇幅。如：

It is an impossible task to examine the entire history of Marxism in the space of a single chapter. 想仅用一章的篇幅回顾马克思主义的全部历史是不可能的。

in the time of：该短语用于时间多指“在…时期或时代”（不指具体的时间长度）。如：

in the time of Queen Victoria 在维多利亚女王时代

It was built in the time of Henry V. 这修建于英王亨利五世时代。

Socrates lived in the time of Pericles. 苏格拉底生活在佩里克里斯时期。

in the time of 中的 time 有时也表示“时间”“时候”。如：

The airline will inform you of any alteration in the time of departure. 航空公司会将起飞时间的变更通知给你。

We pray thee, of thy great mercy, to minister grace to us in the time of our temptation. 求主在我们受到诱惑之时，赐给我们隆恩。