I've been studying GMAT for two months, done OG, both math and verbal, twice so far. I just started GWD first set today....oh my god, result 只能用慘不忍睹來形容, 信心大受打擊. 想請問大家這是正常的嗎? because I found level of difficulty on GWD is much higher than OG. 再一個月就要考了, 可否請問大家 any tips to improve my score?