A. what
Đáp án C
“that” ở đây là mệnh đề quan hệ, thay thế cho weather pattern ở phía trước
In this way, we can put you in a (59)_________ at the most suitable level.
Scientists are unsure of the reason for this (70)_______ on the global scale either.
The trains which go through the Chunnel can travel at up to 300km/h due to the(31)_________ electrical system.
Colleagues normally use the family names, and title - for example 'Doctor' or 'Professor', so you shouldn't use first names (50) ________ a person asks you to.