自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
N-SING 程度;地步 If you are talking about how great, important, or serious a difficulty or situation is, you can refer to the extent of it.
The government itself has little information on the extent of industrial pollution...
Growing up with him soon made me realise the extent of his determination...
N-SING 范围;面积;大小 The extent of something is its length, area, or size.
Their commitment was only to maintain the extent of forests, not their biodiversity.
PHRASE 在很大程度上/ 在某种程度上/在一定程度上 You use expressions such as to a large extent ,to some extent, or to a certain extent in order to indicate that something is partly true, but not entirely true.
It was and, to a large extent, still is a good show...
To some extent this was the truth...
PHRASE 到何种程度/到那种程度/到…的程度 You use expressions such as to what extent ,to that extent, or to the extent that when you are discussing how true a statement is, or in what ways it is true.
It's still not clear to what extent this criticism is originating from within the ruling party...
To that extent they helped bring about their own destruction...
PHRASE （表示强调）到…的地步，到…的程度 You use expressions such as to the extent of ,to the extent that, or to such an extent that in order to emphasize that a situation has reached a difficult, dangerous, or surprising stage.
He said he didn't like the president, but not to the extent of wanting to kill him...
I became pregnant but this man was very violent towards me to the extent that I lost our baby...