By Ahmad Ghaddar LONDON (Reuters) – Oil prices fell on Thursday, hovering around two-month lows as the level of a proposed G7 cap on the price of Russian oil raised doubts about how much it would limit supply. A bigger than expected build in U.S. gasoline inventories and widening COVID-19 controls in China also added downward pressure on crude prices. Brent crude futures were down 77 cents, or 0.9%, to $84.64 a barrel at 1445 GMT, while U.S. West Texas Intermediate (WTI) crude futures fell 36 cents, or 0.5%, to $77.58. Both benchmarks plunged more than 3% on Wednesday on news the planned price…