4.2
Task1 because最好去掉 另外你的原因是和同事关系好了efficiency提高,例子讲的是colleague帮助你,关联性最好可以更强...开头干脆就说You can got plenty of help from them比较好
Task2 necessary发音没发好 另外例子部分似乎有点少,也没有强调internet这块。结尾一点internet的表述就都解决了,比如It's really embarrassing to google the history of your own country..